Improvement in combined knob-latches and locks



1. F. COOPER.

Cumbihed Knob-Latch and Lock. No. 168,377, Patented0ct.5,1875.

lTTOBNEYS.

MPETERS. FHOTO-LITHOGRAPHEm WASHINGTON D C.

UNITED STATES PATENT OFFICE,

JAMES F. COOPER, OF SYRACUSE, OHIO.

IMPROVEMENT IN COMBINED KNOB-LATCHES AND LOCKS Specification forming part of Letters Patent No. 168,377, dated October 5, 1875; application filed August 14, 1875.

To all whom it may concern:

Be it known that I, JAMES F. COOPER, of Syracuse, in the county of Meigs and State of Ohio, have invented a new and Improved Look, of which the following is a specification:

The invention consists in the combination of a key-bolt, latch-bolt, and tumbler, which are so constructed and relatively arranged that the key-bolt is fastened by the lateh'bolt and tumbler, while the entire withdrawal of the latch-bolt is prevented by the said tumbler.

Figure 1 is an elevation of the lock with one side of the case removed, showing both bolts shot. Fig. 2 is an elevation, showing the keybolt withdrawn.

Similar letters of reference indicate correspondin g parts.

A is the key-bolt, having two notches, B and O, for the key, contrived to make the bolt throw half-way by each turn of the key. D is the tumbler, which looks the bolt by falling behind the stud E. It has an extension, F,

under the latch-bolt Gr, so contrived that the latch-bolt prevents the rising of it unless the notch H permits by being shifted over it by partly throwing the latch-bolt back by the knob. At the same time the projection I of the latch-bolt prevents the latter from being withdrawn until the key-bolt is drawn back,

The combination of key-bolt A, having stud E and notch J, tumbler D, having projection F, and latch-bolt Gr, having notch H, all substantially as specified.

JAMES FRANKLIN COOPER. Witnesses:

DAVID W. CURTIS, THOMAS L. KINNEY. 

